Using tools on either a Mac or PC, does anyone have a suggestion for how to convert (with minimal/no quality loss) a demuxed H264 file from a Blu-Ray disc into a Quicktime File that I can edit in Final Cut Pro? (Ideally, I want to use ProRes422HQ at 1920X1080, but I can easily transcode to ProRes from another QT codec using Compressor 3 if need be.)

Thanks in advance for any help you might be able to offer.